我正在开发一个使用mp3 UI的JavaFX播放器。当我用NetBeans启动应用程序时,它工作得很好。但是,当我用清理创建一个可执行的jar并构建并使用cmd启动它时,我会得到一个异常,其中FXMLLoader加载了fxml文件。
这条路肯定有问题,对吧?
First Project Structure
我创建了第二个应用程序,并将所有内容存储在一个文件夹中。创建了一个可执行的jar,它运行得很好。
第二工程结构
源代码(第一)
package jornsfx;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.stage.Stage;
public class JornsFX extends Application{
@Override
public void start(Stage stage)throws Exception{
stage.setResizable(false);
Parent root = FXMLLoader.load(getClass().getResource("/views/jornsFX.fxml"));
Scene scene = new Scene(root);
stage.setScene(scene);
stage.setTitle("JornsFX");
stage.show();
}
public static void main(String[] args) {
launch(args);
}
}异常(第一)
Exception in Application start method
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$155(LauncherImpl.java:182)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NullPointerException: Location is required.
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3207)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3175)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3148)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3124)
at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3104)
at javafx.fxml.FXMLLoader.load(FXMLLoader.java:3097)
at jornsfx.JornsFX.start(JornsFX.java:14)
at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$162(LauncherImpl.java:863)
at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)
at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
... 1 more
Exception running application jornsfx.JornsFX发布于 2018-03-29 11:02:20
我不能肯定地告诉你,但看起来
getClass().getResource("/views/jornsFX.fxml")在您的start()方法中是null。异常提示它,并在屏幕截图中将文件命名为/views/JornsFX.fxml。
https://stackoverflow.com/questions/49552553
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